[PATCH v1 6/8] qemu: build command line for the TPM Proxy device

[Daniel Henrique Barboza <danielhb413@xxxxxxxxx>]

This patch wraps it up all the wiring done in previous patches,
enabling a PPC64 guest to launch a guest using a TPM Proxy
device.

Note that device validation is already being done in
qemu_validate.c, qemuValidateDomainDeviceDefTPMProxy(), on
domain define time. We don't need to verify QEMU capabilities for
this device again in qemu_command.c

Signed-off-by: Daniel Henrique Barboza <danielhb413@xxxxxxxxx>
---
 src/libvirt_private.syms |  2 ++
 src/qemu/qemu_alias.c    | 16 ++++++++++++++++
 src/qemu/qemu_command.c  | 20 ++++++++++++++++++++
 3 files changed, 38 insertions(+)

diff --git a/src/libvirt_private.syms b/src/libvirt_private.syms
index 935ef7303b..b242c6164e 100644
--- a/src/libvirt_private.syms
+++ b/src/libvirt_private.syms
@@ -636,6 +636,8 @@ virDomainTPMBackendTypeToString;
 virDomainTPMDefFree;
 virDomainTPMModelTypeFromString;
 virDomainTPMModelTypeToString;
+virDomainTPMProxyModelTypeFromString;
+virDomainTPMProxyModelTypeToString;
 virDomainUSBDeviceDefForeach;
 virDomainVideoDefaultRAM;
 virDomainVideoDefClear;
diff --git a/src/qemu/qemu_alias.c b/src/qemu/qemu_alias.c
index b0ea62af39..b21d5bb514 100644
--- a/src/qemu/qemu_alias.c
+++ b/src/qemu/qemu_alias.c
@@ -413,6 +413,18 @@ qemuAssignDeviceTPMAlias(virDomainTPMDefPtr tpm,
 }
 
 
+static int
+qemuAssignDeviceTPMProxyAlias(virDomainTPMProxyDefPtr tpmproxy,
+                              int idx)
+{
+    if (tpmproxy->info.alias)
+        return 0;
+
+    tpmproxy->info.alias = g_strdup_printf("tpmproxy%d", idx);
+    return 0;
+}
+
+
 int
 qemuAssignDeviceRedirdevAlias(virDomainDefPtr def,
                               virDomainRedirdevDefPtr redirdev,
@@ -673,6 +685,10 @@ qemuAssignDeviceAliases(virDomainDefPtr def, virQEMUCapsPtr qemuCaps)
         if (qemuAssignDeviceTPMAlias(def->tpm, 0) < 0)
             return -1;
     }
+    if (def->tpmproxy) {
+        if (qemuAssignDeviceTPMProxyAlias(def->tpmproxy, 0) < 0)
+            return -1;
+    }
     for (i = 0; i < def->nmems; i++) {
         if (qemuAssignDeviceMemoryAlias(NULL, def->mems[i], false) < 0)
             return -1;
diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c
index 9065164b1d..40a8505d24 100644
--- a/src/qemu/qemu_command.c
+++ b/src/qemu/qemu_command.c
@@ -9318,6 +9318,23 @@ qemuBuildTPMCommandLine(virCommandPtr cmd,
     return 0;
 }
 
+static int
+qemuBuildTPMProxyCommandLine(virCommandPtr cmd,
+                             const virDomainDef *def)
+{
+    const virDomainTPMProxyDef *tpmproxy = def->tpmproxy;
+
+    if (!tpmproxy)
+        return 0;
+
+    virCommandAddArg(cmd, "-device");
+    virCommandAddArgFormat(cmd, "%s,id=%s,host-path=%s",
+                           virDomainTPMProxyModelTypeToString(tpmproxy->model),
+                           tpmproxy->info.alias, tpmproxy->path);
+
+    return 0;
+}
+
 static int
 qemuBuildSEVCommandLine(virDomainObjPtr vm, virCommandPtr cmd,
                         virDomainSEVDefPtr sev)
@@ -9999,6 +10016,9 @@ qemuBuildCommandLine(virQEMUDriverPtr driver,
     if (qemuBuildTPMCommandLine(cmd, def, qemuCaps) < 0)
         return NULL;
 
+    if (qemuBuildTPMProxyCommandLine(cmd, def) < 0)
+        return NULL;
+
     if (qemuBuildInputCommandLine(cmd, def, qemuCaps) < 0)
         return NULL;
 
-- 
2.26.2